| # Copyright 2015 gRPC authors. |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| require 'spec_helper' |
| |
| Thread.abort_on_exception = true |
| |
| describe GRPC::Pool do |
| Pool = GRPC::Pool |
| |
| describe '#new' do |
| it 'raises if a non-positive size is used' do |
| expect { Pool.new(0) }.to raise_error |
| expect { Pool.new(-1) }.to raise_error |
| expect { Pool.new(Object.new) }.to raise_error |
| end |
| |
| it 'is constructed OK with a positive size' do |
| expect { Pool.new(1) }.not_to raise_error |
| end |
| end |
| |
| describe '#ready_for_work?' do |
| it 'before start it is not ready' do |
| p = Pool.new(1) |
| expect(p.ready_for_work?).to be(false) |
| end |
| |
| it 'it stops being ready after all workers are busy' do |
| p = Pool.new(5) |
| p.start |
| |
| wait_mu = Mutex.new |
| wait_cv = ConditionVariable.new |
| wait = true |
| |
| job = proc do |
| wait_mu.synchronize do |
| wait_cv.wait(wait_mu) while wait |
| end |
| end |
| |
| 5.times do |
| expect(p.ready_for_work?).to be(true) |
| p.schedule(&job) |
| end |
| |
| expect(p.ready_for_work?).to be(false) |
| |
| wait_mu.synchronize do |
| wait = false |
| wait_cv.broadcast |
| end |
| end |
| end |
| |
| describe '#schedule' do |
| it 'return if the pool is already stopped' do |
| p = Pool.new(1) |
| p.stop |
| job = proc {} |
| expect { p.schedule(&job) }.to_not raise_error |
| end |
| |
| it 'adds jobs that get run by the pool' do |
| p = Pool.new(1) |
| p.start |
| o, q = Object.new, Queue.new |
| job = proc { q.push(o) } |
| p.schedule(&job) |
| expect(q.pop).to be(o) |
| p.stop |
| end |
| end |
| |
| describe '#stop' do |
| it 'works when there are no scheduled tasks' do |
| p = Pool.new(1) |
| expect { p.stop }.not_to raise_error |
| end |
| |
| it 'stops jobs when there are long running jobs' do |
| p = Pool.new(1) |
| p.start |
| |
| wait_forever_mu = Mutex.new |
| wait_forever_cv = ConditionVariable.new |
| wait_forever = true |
| |
| job_running = Queue.new |
| job = proc do |
| job_running.push(Object.new) |
| wait_forever_mu.synchronize do |
| wait_forever_cv.wait while wait_forever |
| end |
| end |
| p.schedule(&job) |
| job_running.pop |
| expect { p.stop }.not_to raise_error |
| end |
| end |
| |
| describe '#start' do |
| it 'runs jobs as they are scheduled' do |
| p = Pool.new(5) |
| o, q = Object.new, Queue.new |
| p.start |
| n = 5 # arbitrary |
| n.times do |
| p.schedule(o, &q.method(:push)) |
| expect(q.pop).to be(o) |
| end |
| p.stop |
| end |
| end |
| end |